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UID:submissions.pasc-conference.org_PASC24_sess117_msa214@linklings.com
SUMMARY:Towards Reactor-Scale Simulations of Edge and Scrape-Off Layer Tur
 bulence with the Global Gyrokinetic Code GENE-X
DESCRIPTION:Minisymposium\n\nPhilipp Ulbl, Jordy Trilaksono, Baptiste Frei
 , and Frank Jenko (Max Planck Institute for Plasma Physics)\n\nFuture deve
 lopments towards magnetic confinement fusion energy depend on the understa
 nding of turbulent transport in the edge and scrape-off layer (SOL). Gyrok
 inetic simulations are among the main tools used to improve our understand
 ing of turbulence in the edge and SOL. Such global, high fidelity simulati
 ons provide an accurate description of the relevant physics, however are a
 lso highly expensive in terms of computational costs, even when simulating
  small machines. Approaching reactor relevant, large-scale machines not on
 ly increases the computational size drastically, but also imposes new chal
 lenges in terms of physics. In this talk we present an overview of the rec
 ent progress with the gyrokinetic turbulence code GENE-X, focusing on phys
 ical and computational challenges. GENE-X is an Eulerian-type "continuum" 
 code that solves the collisional, full-f, electromagnetic, gyrokinetic Vla
 sov-Maxwell system on a grid. It is especially targeted towards edge and S
 OL simulations including the magnetic X-point, using the flux-coordinate i
 ndependent (FCI) approach. To bridge the gap between simulations of small 
 experiments and future reactors, we pursue two approaches. First, the code
  is ported to GPUs and, second, we implement an optimized spectral velocit
 y space discretization. These improvements allow the GENE-X code to perfor
 m simulations of turbulence in large-scale fusion devices.\n\nDomain: Phys
 ics, Computational Methods and Applied Mathematics\n\nSession Chairs: Step
 han Brunner (EPFL); Eric Sonnendrücker (Max Planck Institute for Plasma Ph
 ysics, Technical University of Munich); and Laurent Villard (EPFL)
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